Question about 2007 Chevrolet Cobalt Coupe

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I live on an island in the Caribbean.My 2007 Cobalt will not start.DTC 0315 is/was set.I have replaced the Cranckshaft sensor.How can I reprogram the PCM WITHOUT having a Tech 2 scan tool?If I by a new Control module can it be programmed in the USA before I install it in my vehicle?Pease help my so I can drive this Cobalt again.Thank You in advance

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  • renecorvette Sep 06, 2010

    Dear Sir,

    Sorry I forgot to mention that my vehicle does NOT start,only crancks but no spark.I also have a DTC

    P062F,but cannot find a description of this DTC.Thank You in advance for Your support,Regards,Rene

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  • Chevrolet Master
  • 17,970 Answers

P0315 = Crankshaft Position System Variation Not Learned.

Sounds like the crank sensor might be shot... but I'm guessing you would also see the car misfiring or giving other symptoms if the crank sensor was bad. You could try clearing the codes and see if it returns if there are no symptoms.

Basically the ECU is not getting crankshaft pulse signal. It's probably running on emergency strategy and that could be why your getting some misfires.

Hope helps.

Posted on Sep 06, 2010

  • ZJ Limited
    ZJ Limited Sep 06, 2010

    Definition of Diagnostic Trouble - Code P062F
    Cartegory: Powertrain
    Definition: Internal Control Module EEPROM Error

    Note: This definition of P062F is applied to all manufacturers

    P2610
    Notes

    DTC P0602, P0606, P060B, P061C, P062C, P062F, or P2610

    Diagnostic Instructions
    Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Diagnostic System Check - Vehicle
    Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    Diagnostic Procedure Instructions provide an overview of each diagnostic category.

    DTC Descriptors

    DTC P0602
    Control Module Not Programmed

    DTC P0606
    Control Module Internal Performance

    DTC P060B
    Control Module Analog to Digital Performance

    DTC P061C
    Control Module Engine Speed Performance

    DTC P062C
    Control Module Vehicle Speed Performance

    DTC P062F
    Control Module Long Term Memory Performance

    DTC P2610
    Control Module Ignition Off Timer Performance
    Description

    These DTCs apply to internal microprocessor integrity conditions within the engine control module (ECM). This diagnostic also addresses if the ECM is not programmed.

    The ECM monitors its ability to read and write to the memory. It also monitors a timing function.

    Conditions for Running the DTC

    P0602
    The ignition switch is ON.
    The controller is identified as a service replacement ECM.

    P0606
    The ignition switch is in Run or Crank.
    The power take-off (PTO) is inactive.
    The cruise control is inactive.

    P060B
    The engine speed is more than 650 RPM .
    The ECM is powered up.

    P061C
    The ignition is ON.
    The engine speed is less than 1,300 RPM .

    P062C
    The ignition is ON.

    P062F
    The ignition is ON.

    P2610
    The ECM is powered up.

    Conditions for Setting the DTC

    P0602
    The ECM has not been programmed at Key On and Engine Off for 0.1 second .
    This diagnostic runs continuously.

    P0606
    The ECM detects a microprocessor undervoltage or overvoltage condition. OR
    The ECM detects an internal bus communication error. OR
    The ECM detects an internal clock error. OR
    The ECM detects an internal injector control error.
    All tests run in less than 1 second .
    This DTC runs continuously.

    P060B
    The ECM detects an incorrect internal analog/digital (A/D) signal for less than 1 second .
    This DTC runs continuously.

    P061C
    The ECM detects that there is a difference between the CKP engine speed and the calculated engine speed of more than 320 RPM for less than 1 second .
    This diagnostic runs continuously.

    P062C
    The ECM detects a fault in the ship that calculates redundant vehicle speed for more than 1 second .
    This DTC runs continuously.

    P062F
    The ECM did not complete the last electronic erasable programmable read only memory (EEPROM) write event during the last ECM power down.
    This diagnostic runs once per ignition cycle at power up.

    P2610
    The ignition off-timer is less than 0 second . OR
    The ignition off-timer is less than 5 seconds for more than 10 seconds . OR
    The ignition off-timer is unchanged for 60 seconds . OR
    The ignition off-timer is not incrementing in 1-second intervals.
    Action Taken When the DTC Sets

    DTCs P0602, P0606, P060B, P061C, P062C and P062F are Type A DTCs.
    DTC P2610 is a Type B DTC.
    Conditions for Clearing the MIL/DTC

    DTCs P0602, P0606, P060B, P061C, P062C and P062F are Type A DTCs.
    DTC P2610 is a Type B DTC.
    Circuit/System Testing

    Observe the DTCs with the scan tool.
    * If DTC P0602 or P062F is set, attempt to program the ECM before replacing the ECM. Refer to Service Programming System (SPS). See: Testing and Inspection\Programming and Relearning\Service Programming System (SPS)
    * If DTC P0606 was set while performing SPS Programming, clear the DTCs and exit the diagnostic.
    * If DTC P0606 was set with DTC P0851 or P0852, first go to Diagnostic Trouble Code (DTC) List - Vehicle. See: Diagnostic Trouble Code Descriptions\Diagnostic Trouble Code (DTC) List - Vehicle

    Test the voltage and ground circuits to the control module for the following:
    - A short
    - An open
    - High resistance
    Important: DTC P2610 can be set with a loss of battery voltage to the ECM with the ignition ON. The ignition must be in the OFF position before disconnecting the ECM.

    If DTC P2610 is set, turn the ignition OFF and then completely disconnect the ECM harness connector from the ECM for approximately 1 minute . Reinstall all of the ECM connectors and then attempt to clear codes with the scan tool.
    * If DTC P2610 resets after code clear, replace the ECM.

    Replace the ECM.

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